Add full sortof codebase: API, drain workers, frontend, schema, specs

data/pz_versions.json

@@ -0,0 +1,11 @@
+{
+  "_about": "Human-readable PZ build labels for the 3 published Steam branches. Edit when TIS publishes a new build; the API loads this file at startup (no rebuild needed, but a 'sudo systemctl restart sortof-api' is required to pick up changes).",
+  "_branches": {
+    "stable": "Steam branch 'public' — current B41 release line.",
+    "unstable": "Steam branch 'unstable' — latest B42 testing build.",
+    "outdatedunstable": "Steam branch 'outdatedunstable' — previous unstable build, kept for rollback."
+  },
+  "stable": "B41.78.19",
+  "unstable": "B42.17.0",
+  "outdatedunstable": "B42.16.3"
+}